install torch_scatter from conda instead of pypi

maybe those binaries actually work?

.github/workflows/ci.yml

@@ -77,12 +77,15 @@ jobs:
             channel_priority: flexible
           create-args: |
             python=${{ matrix.python-version }}
-      - name: Install dependencies
+      - name: Install Dependencies
         shell: bash -l {0}
         run: |
           python -m pip install flake8 pytest parameterized nbmake
           python -m pip install torch==2.2.0
-          python -m pip install torch-scatter -f https://data.pyg.org/whl/torch-2.2.0+cpu.html
+          # fails to build Wheel on MacOS
+          # python -m pip install torch-scatter -f https://data.pyg.org/whl/torch-2.2.0+cpu.html
+          # use the conda binaries instead
+          mamba install pytorch-scatter -c pyg
           python -m pip install -e ".[dev,docs,test]"
       - name: Test with pytest
         shell: bash -l {0}